Neutrino physics in Super-Kamiokande and Hyper-Kamiokande

The neutrino is one of the elementary particles. In the field of particle physics, the question of whether neutrinos have mass has existed for many years. In 1998, the Super-Kamiokande experiment made the first discovery of the neutrino oscillation using the atmospheric neutrino anomaly. It was direct evidence of neutrino mass. Recently, more precise measurements of neutrino oscillation parameters have been performed using not only atmospheric neutrinos but also neutrinos from the Sun, accelerators and reactors. The detection of the next supernova neutrino is awaited and is expected to improve our understanding of the death of the massive stars. The history and the current status of neutrino physics, especially with respect to the Super-Kamiokande experiment and the potential of the Hyper-Kamiokande experiment were presented in the lecture.